1 files changed, 237 insertions, 0 deletions

diff --git a/include/uapi/linux/dccp.h b/include/uapi/linux/dccp.h
new file mode 100644
index 000000000000..52a9cd7307e7
--- /dev/null
+++ b/include/uapi/linux/dccp.h
@@ -0,0 +1,237 @@
+#ifndef _UAPI_LINUX_DCCP_H
+#define _UAPI_LINUX_DCCP_H
+
+#include <linux/types.h>
+#include <asm/byteorder.h>
+
+/**
+ * struct dccp_hdr - generic part of DCCP packet header
+ *
+ * @dccph_sport - Relevant port on the endpoint that sent this packet
+ * @dccph_dport - Relevant port on the other endpoint
+ * @dccph_doff - Data Offset from the start of the DCCP header, in 32-bit words
+ * @dccph_ccval - Used by the HC-Sender CCID
+ * @dccph_cscov - Parts of the packet that are covered by the Checksum field
+ * @dccph_checksum - Internet checksum, depends on dccph_cscov
+ * @dccph_x - 0 = 24 bit sequence number, 1 = 48
+ * @dccph_type - packet type, see DCCP_PKT_ prefixed macros
+ * @dccph_seq - sequence number high or low order 24 bits, depends on dccph_x
+ */
+struct dccp_hdr {
+        __be16  dccph_sport,
+                dccph_dport;
+        __u8    dccph_doff;
+#if defined(__LITTLE_ENDIAN_BITFIELD)
+        __u8    dccph_cscov:4,
+                dccph_ccval:4;
+#elif defined(__BIG_ENDIAN_BITFIELD)
+        __u8    dccph_ccval:4,
+                dccph_cscov:4;
+#else
+#error  "Adjust your <asm/byteorder.h> defines"
+#endif
+        __sum16 dccph_checksum;
+#if defined(__LITTLE_ENDIAN_BITFIELD)
+        __u8    dccph_x:1,
+                dccph_type:4,
+                dccph_reserved:3;
+#elif defined(__BIG_ENDIAN_BITFIELD)
+        __u8    dccph_reserved:3,
+                dccph_type:4,
+                dccph_x:1;
+#else
+#error  "Adjust your <asm/byteorder.h> defines"
+#endif
+        __u8    dccph_seq2;
+        __be16  dccph_seq;
+};
+
+/**
+ * struct dccp_hdr_ext - the low bits of a 48 bit seq packet
+ *
+ * @dccph_seq_low - low 24 bits of a 48 bit seq packet
+ */
+struct dccp_hdr_ext {
+        __be32  dccph_seq_low;
+};
+
+/**
+ * struct dccp_hdr_request - Connection initiation request header
+ *
+ * @dccph_req_service - Service to which the client app wants to connect
+ */
+struct dccp_hdr_request {
+        __be32  dccph_req_service;
+};
+/**
+ * struct dccp_hdr_ack_bits - acknowledgment bits common to most packets
+ *
+ * @dccph_resp_ack_nr_high - 48 bit ack number high order bits, contains GSR
+ * @dccph_resp_ack_nr_low - 48 bit ack number low order bits, contains GSR
+ */
+struct dccp_hdr_ack_bits {
+        __be16  dccph_reserved1;
+        __be16  dccph_ack_nr_high;
+        __be32  dccph_ack_nr_low;
+};
+/**
+ * struct dccp_hdr_response - Connection initiation response header
+ *
+ * @dccph_resp_ack - 48 bit Acknowledgment Number Subheader (5.3)
+ * @dccph_resp_service - Echoes the Service Code on a received DCCP-Request
+ */
+struct dccp_hdr_response {
+        struct dccp_hdr_ack_bits        dccph_resp_ack;
+        __be32                          dccph_resp_service;
+};
+
+/**
+ * struct dccp_hdr_reset - Unconditionally shut down a connection
+ *
+ * @dccph_reset_ack - 48 bit Acknowledgment Number Subheader (5.6)
+ * @dccph_reset_code - one of %dccp_reset_codes
+ * @dccph_reset_data - the Data 1 ... Data 3 fields from 5.6
+ */
+struct dccp_hdr_reset {
+        struct dccp_hdr_ack_bits        dccph_reset_ack;
+        __u8                            dccph_reset_code,
+                                        dccph_reset_data[3];
+};
+
+enum dccp_pkt_type {
+        DCCP_PKT_REQUEST = 0,
+        DCCP_PKT_RESPONSE,
+        DCCP_PKT_DATA,
+        DCCP_PKT_ACK,
+        DCCP_PKT_DATAACK,
+        DCCP_PKT_CLOSEREQ,
+        DCCP_PKT_CLOSE,
+        DCCP_PKT_RESET,
+        DCCP_PKT_SYNC,
+        DCCP_PKT_SYNCACK,
+        DCCP_PKT_INVALID,
+};
+
+#define DCCP_NR_PKT_TYPES DCCP_PKT_INVALID
+
+static inline unsigned int dccp_packet_hdr_len(const __u8 type)
+{
+        if (type == DCCP_PKT_DATA)
+                return 0;
+        if (type == DCCP_PKT_DATAACK    ||
+            type == DCCP_PKT_ACK        ||
+            type == DCCP_PKT_SYNC       ||
+            type == DCCP_PKT_SYNCACK    ||
+            type == DCCP_PKT_CLOSE      ||
+            type == DCCP_PKT_CLOSEREQ)
+                return sizeof(struct dccp_hdr_ack_bits);
+        if (type == DCCP_PKT_REQUEST)
+                return sizeof(struct dccp_hdr_request);
+        if (type == DCCP_PKT_RESPONSE)
+                return sizeof(struct dccp_hdr_response);
+        return sizeof(struct dccp_hdr_reset);
+}
+enum dccp_reset_codes {
+        DCCP_RESET_CODE_UNSPECIFIED = 0,
+        DCCP_RESET_CODE_CLOSED,
+        DCCP_RESET_CODE_ABORTED,
+        DCCP_RESET_CODE_NO_CONNECTION,
+        DCCP_RESET_CODE_PACKET_ERROR,
+        DCCP_RESET_CODE_OPTION_ERROR,
+        DCCP_RESET_CODE_MANDATORY_ERROR,
+        DCCP_RESET_CODE_CONNECTION_REFUSED,
+        DCCP_RESET_CODE_BAD_SERVICE_CODE,
+        DCCP_RESET_CODE_TOO_BUSY,
+        DCCP_RESET_CODE_BAD_INIT_COOKIE,
+        DCCP_RESET_CODE_AGGRESSION_PENALTY,
+
+        DCCP_MAX_RESET_CODES            /* Leave at the end!  */
+};
+
+/* DCCP options */
+enum {
+        DCCPO_PADDING = 0,
+        DCCPO_MANDATORY = 1,
+        DCCPO_MIN_RESERVED = 3,
+        DCCPO_MAX_RESERVED = 31,
+        DCCPO_CHANGE_L = 32,
+        DCCPO_CONFIRM_L = 33,
+        DCCPO_CHANGE_R = 34,
+        DCCPO_CONFIRM_R = 35,
+        DCCPO_NDP_COUNT = 37,
+        DCCPO_ACK_VECTOR_0 = 38,
+        DCCPO_ACK_VECTOR_1 = 39,
+        DCCPO_TIMESTAMP = 41,
+        DCCPO_TIMESTAMP_ECHO = 42,
+        DCCPO_ELAPSED_TIME = 43,
+        DCCPO_MAX = 45,
+        DCCPO_MIN_RX_CCID_SPECIFIC = 128,       /* from sender to receiver */
+        DCCPO_MAX_RX_CCID_SPECIFIC = 191,
+        DCCPO_MIN_TX_CCID_SPECIFIC = 192,       /* from receiver to sender */
+        DCCPO_MAX_TX_CCID_SPECIFIC = 255,
+};
+/* maximum size of a single TLV-encoded DCCP option (sans type/len bytes) */
+#define DCCP_SINGLE_OPT_MAXLEN  253
+
+/* DCCP CCIDS */
+enum {
+        DCCPC_CCID2 = 2,
+        DCCPC_CCID3 = 3,
+};
+
+/* DCCP features (RFC 4340 section 6.4) */
+enum dccp_feature_numbers {
+        DCCPF_RESERVED = 0,
+        DCCPF_CCID = 1,
+        DCCPF_SHORT_SEQNOS = 2,
+        DCCPF_SEQUENCE_WINDOW = 3,
+        DCCPF_ECN_INCAPABLE = 4,
+        DCCPF_ACK_RATIO = 5,
+        DCCPF_SEND_ACK_VECTOR = 6,
+        DCCPF_SEND_NDP_COUNT = 7,
+        DCCPF_MIN_CSUM_COVER = 8,
+        DCCPF_DATA_CHECKSUM = 9,
+        /* 10-127 reserved */
+        DCCPF_MIN_CCID_SPECIFIC = 128,
+        DCCPF_SEND_LEV_RATE = 192,      /* RFC 4342, sec. 8.4 */
+        DCCPF_MAX_CCID_SPECIFIC = 255,
+};
+
+/* DCCP socket control message types for cmsg */
+enum dccp_cmsg_type {
+        DCCP_SCM_PRIORITY = 1,
+        DCCP_SCM_QPOLICY_MAX = 0xFFFF,
+        /* ^-- Up to here reserved exclusively for qpolicy parameters */
+        DCCP_SCM_MAX
+};
+
+/* DCCP priorities for outgoing/queued packets */
+enum dccp_packet_dequeueing_policy {
+        DCCPQ_POLICY_SIMPLE,
+        DCCPQ_POLICY_PRIO,
+        DCCPQ_POLICY_MAX
+};
+
+/* DCCP socket options */
+#define DCCP_SOCKOPT_PACKET_SIZE        1 /* XXX deprecated, without effect */
+#define DCCP_SOCKOPT_SERVICE            2
+#define DCCP_SOCKOPT_CHANGE_L           3
+#define DCCP_SOCKOPT_CHANGE_R           4
+#define DCCP_SOCKOPT_GET_CUR_MPS        5
+#define DCCP_SOCKOPT_SERVER_TIMEWAIT    6
+#define DCCP_SOCKOPT_SEND_CSCOV         10
+#define DCCP_SOCKOPT_RECV_CSCOV         11
+#define DCCP_SOCKOPT_AVAILABLE_CCIDS    12
+#define DCCP_SOCKOPT_CCID               13
+#define DCCP_SOCKOPT_TX_CCID            14
+#define DCCP_SOCKOPT_RX_CCID            15
+#define DCCP_SOCKOPT_QPOLICY_ID         16
+#define DCCP_SOCKOPT_QPOLICY_TXQLEN     17
+#define DCCP_SOCKOPT_CCID_RX_INFO       128
+#define DCCP_SOCKOPT_CCID_TX_INFO       192
+
+/* maximum number of services provided on the same listening port */
+#define DCCP_SERVICE_LIST_MAX_LEN      32
+
+
+#endif /* _UAPI_LINUX_DCCP_H */